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We're sorry but all Color/Size combinations for this product are currently out of stock. You can be notified upon their arrival by choosing the Color and Size options you are interested in and then entering your email in the yellow box below.

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Related Video

Thor Youth Quadrant Rockstar Helmet 2012 Videos

Quadrant Youth Helmets offer increased performance, reduced weight, and innovative styling. Designed to exceed both DOT and ECE 22.05 standards, the Quadrant helmet is loaded with features normally found only on more expensive helmets. The Quadrant offers comfort and performance in a lightweight package that’s got just the right balance and a great, secure fit. Next time you ride, don’t settle for anything less then the category leading Quadrant Helmet. . 2.9 LBS. (1300 GRAMS).

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If you have a customer service or shipping question, please direct it to our Customer Service department.

Thor Helmet Sizing

Size

Inches

Cm

Hat Size (in)

2XS

20-1/2

52-53

6-1/2

XS

20-7/8 - 21-1/4

53-54

6-5/8 - 6-3/4

SM

21-5/8 - 22

55-56

6-7/8 - 7

MD

22-3/8 - 22-3/8

57-58

7-1/8 - 7-1/4

LG

22-3/4 - 23-1/8

59-60

7-3/8 - 7-1/2

XL

23-1/2 - 24

61-62

7-5/8 - 7-3/4

2XL

24-3/4 - 25-1/8

63-64

7-7/8 - 8-1/8

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.